AD/CESSNA 337/21 Amdt 1 - Pre-Certification Requirements - Modification

Overview

The Civil Aviation Regulations 1998, specifically Part 39, addresses the need for maintaining aircraft airworthiness and ensuring safety in civil aviation operations. The regulations were enacted by the Commonwealth of Australia and are overseen by the Civil Aviation Safety Authority (CASA). They aim to establish stringent safety standards to prevent accidents and ensure the safety of passengers and crew. One such regulation is the Airworthiness Directive for Cessna 337 Series Aeroplanes, specifically AD/CESSNA 337/21 Amendment 1, which targets pre-certification requirements and modifications to ensure compliance with safety standards. This directive outlines specific modifications necessary to address identified safety issues, including placard installations, bonding and earthing points, seat modifications, and fire-resistant hose replacements, all of which are intended to enhance the overall safety of the aircraft.

Scope and Application

The Civil Aviation Regulations 1998, specifically PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES for Cessna 337 Series Aeroplanes, applies to all model 337G aircraft. The regulations mandate specific modifications to ensure compliance with safety standards. These include the installation of placards indicating smoking prohibitions and emergency seat backrest operations, bonding and earthing points for fuelling equipment, and secure attachment of seats. The regulations also require compliance with fire resistance standards for hoses carrying flammable fluids. These requirements must be fulfilled before a Certificate of Airworthiness is issued. The scope of the Act extends to the Commonwealth level, ensuring uniform safety standards across Australia. Subordinate instruments may further detail specific compliance measures and acceptable modifications.

Key Provisions

The Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives for the Cessna 337 Series Aeroplanes, specifically AD/CESSNA 337/21 Amendment 1, mandates several pre-certification modifications to ensure the aircraft's safety and compliance with regulatory standards (Civil Aviation Regulations 1998, Part 39 - 105). These modifications apply to all model 337G aircraft and must be completed before a Certificate of Airworthiness is issued. Key requirements include installing placards to indicate smoking prohibitions and ensuring compliance with Australian National Standards for fuel and electrical bonding. Specifically, the directive requires the installation of placards clearly visible to the occupants of seats 1 and 2, specifying when smoking is prohibited (section a). Additionally, a "NO SMOKING" placard must be installed for the occupant of seat row 3 (section a). Other requirements involve installing and identifying bonding and earthing points for fuelling equipment and external electrical connections, which must be clearly marked and compliant with Australian National Standards (section 2). The Cessna 337 Series must also undergo modifications to the second row seat backrest locking pin to allow it to be pushed forward by the occupants of the third row under specific force conditions (section 3a). This modification must be approved by the Secretary and can be demonstrated by adhering to modifications outlined in approved drawings from ARCAV ALBURY or Rex Aviation Ltd. Furthermore, a placard must be affixed to the rear of the second row seat backrest, instructing occupants of the third row to push the centre seat backrest forward in an emergency (section 3b). Another placard must be placed on the pilot's instrument panel, reminding pilots to ensure the centre seats are latched down before flight (section 4). The third row seats must be securely attached to the cabin floor structure and the seat backrests to the seat base, following approved modification schemes (sections 5a and 5b). Finally, all flexible hose assemblies carrying flammable fluids in the engine compartment must meet fire resistance standards, or be made compliant by fitting an approved fire sleeve (section 6). Failure to comply with the provisions of this Airworthiness Directive may result in severe legal and safety consequences. The Civil Aviation Regulations 1998 impose strict obligations on aircraft manufacturers, operators, and maintenance providers to ensure that all modifications are carried out correctly and in accordance with the specified standards. Non-compliance can lead to penalties under the Civil Aviation Act 1988, including fines and imprisonment. The maximum penalties for serious breaches can include substantial financial penalties and imprisonment for individuals, reflecting the gravity of ensuring the safety and airworthiness of the aircraft in question. For companies, the penalties can be even more severe, with maximum fines and potential disqualification of the Certificate of Airworthiness.